C.R.E.A.M., aka Cash Rules Everything Around Me. There have never been truer words spoken in real life, or even in a video game. After playing BioShock: Infinite for a few days know, I wish I came across this little glitch a little earlier.
The lifeblood of your BioShock character is derived from you vigors, weapons, and salts. In order to use these items, you're going to have to spend some cash.
While you can collect money by searching the pockets of fallen enemies, there are also dollar bill vending machines spread throughout the game, and you can use the Possession vigor to force those machines to pay up.
Of course, using Possession will use up your salts, but luckily the area where this "glitch" occurs has a salt machine ready for unlimited use. Check out this video guide below for location information and see the glitch in action.
Basically, you just need to get to the Hall of Heroes and find the cash dispensing machine on the outside close to the angel statue. Then, when you get your Silver Eagle, head inside and find the salt machine and grab some salt. Then, go back outside and get some more cash.
Repeat. Repeat. Repeat.
For more BioShock: Infinite tips and tricks, be sure to check out all of the achievement / trophy guides.